Malicious PDF — malware analysis report

Static analysis result for SHA-256 50703375b85c52f6…

MALICIOUS

PDF

81.6 KB Created: 2021-01-19 03:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7fadb5612bc87ac1fbeb82bd8acef39b SHA-1: 13476fa731e810a97306091df01e1a2dd6be287e SHA-256: 50703375b85c52f6747a157643461b8a27e5ec39c94081d4920fb2f74245232c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to a 'wii hacking guide'. The presence of numerous links on disposable hosting further supports a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/123?utm_term=complete+wii+hacking+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449629/normal_5fa26e7775ae3.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/texal-radeloxipa-zamabunuvukazum-dufigovumexemoz.pdfIn PDF document text
    • https://site-1166710.mozfiles.com/files/1166710/cute_baby_girl_status.pdfIn PDF document text
    • https://site-1177042.mozfiles.com/files/1177042/tomoriwesaxiwidusugofurur.pdfIn PDF document text
    • https://lefewaxenu.weebly.com/uploads/1/3/4/0/134012542/kigedifafebum.pdfIn PDF document text
    • https://site-1178602.mozfiles.com/files/1178602/35308121632.pdfIn PDF document text
    • https://gedejapel.weebly.com/uploads/1/3/4/3/134314995/9294791.pdfIn PDF document text
    • https://site-1198415.mozfiles.com/files/1198415/52406179485.pdfIn PDF document text
    • https://site-1176018.mozfiles.com/files/1176018/bajurerilinikevugaxod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_5fa59a616353e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dadorisisewane.epizy.com/jofepunew.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/vsco_mod_apk_android_1.pdfIn PDF document text
    • http://wubulunonowov.epizy.com/los_mayas_reporteros_de_la_historia.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 5272 bytes
SHA-256: ab9d043f2580b03a324a357919e2a6ec00c2de424ff4f1143fdd44a6a3671f09
font_01_sfnt_off00011484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11484 10816 bytes
SHA-256: 5efc1b3a09097cf953b430b864aeff1fdc75c31ebeb1858839af417b33e4929a

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